Turbine-bucket cover.



else l y M PATENTED JULY 5, 1904,

H GBISENHONER TURBINE BUCKET COVER.

APPLIOATIOH FILED 11150.19, 1903.

UNITED STATES Patented July 5, 1904.

PATENT OFFICE.

HENRY GEISENHONER, OF SCHENECTADY, NEVI YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEIV YORK.

TURBINE-BUCKET COVER.

SPECIFICATION forming part of Letters Patent No. 764,450, dated J uly 5, 1904.

Application filed December 19, 1903. $erlal No. 185,783. (No model.)

10 all whom it may concern:

Be it known that I, HENRY GEIsENHoNER, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Binding-Bands for Securing Turbine-Bucket Covers, of which the following is a specification.

The present invention relates to the means employed to secure bucket-covers in place, and has for its object to provide a simple and reliable means whereby the sections of the cover may be securely held in place.

In the accompanying drawings, which illustrate one embodiment of my invention, Figure 1 is a partial section of a bucket-wheel. Fig. 2 is a partial plan thereof. Fig. 3 is a detail view in cross-section, showing the relation of the tenons and the binding-band. Fig. 4 is a slight modification wherein two binding-bands are employed where special strength is required. Fig. 5 is a further modification Wherein the cross-section of the binding-band is circular instead of rectangular; and Fig. 6 is a further modification wherein a binding-band of circular cross-section is employed, which is wrapped around the wheel a number of times.

1 represents a support for the buckets and may be stationary or rotary, as desired. In the present instance the buckets 2 are formed integrally therewith and extend radially; but they may be made detachable and extending in any desired direction. The buckets are given any suitable form-such, for example, as that shown in Fig. 2 one face of the bucket being concave and the other convex. Formed integrally with the buckets is a tenon 3. In the present instance each of the buckets is shown as being provided with a tenon; but the tenons may be omitted from certain of the buckets, if desired.

4: represents a bucket-cover, which is preferably slightly wider than the buckets, so as to protect the sharpened edges. It is preferably made up in sections, and the line of division between the sections may coincide with a tenon, as indicated at 5, or it may pass between the tenons, as indicated at 6. In order to secure the cover-sections in place, a binding-band 7 is provided, which is rectangular in cross-section. The band may be made up in sections or it may be made, in a single piece. It will be found to be advantageous to make the joint between the bandseotions register with a tenon, as is indicated at 8, since such an arrangement serves to hold the adjacent ends of the band and prevent them from flying outward under centrifugal force. It is preferable to form the tenons with two projecting lugs or cars 9 and 10, which are afterward riveted over by suitable means to grip the band.

Referring to Fig. 3, the cover is shown as i being inclined slightly from left to right, so as to increase the cross-sectional area of the working passage between the buckets toward the exhaust. The binding-band 7 is shown in its normal position and held in place by the projecting lugsor ears 9 and 10.

Referring to Fig. 4, a slight modification of the invention is shown where two bindingbands 7 are employed, each of which is retained in place by lugs 9 and 10. In other respects the construction may be the same as that previously described.

In Fig. 5 is shown a slight modification wherein the section of the binding-band 7 is made circular instead of rectangular. In this case the lugs?) and 10 serve to hold the band in place, as before.

Referring to Fig. 6, a further modification is shown wherein the binding-band 7 is composed of wire of circular cross-section which is wrapped around the periphery of the wheel a number of times. In the present instance it is wrapped around four times. The tenon 3 on the bucket is made considerably longer (measured axially) than in the previous illustrations and is provided with as many grooves as there are turns of wire. After the wire is mounted in place under the proper tension the small projections 11 are riveted over. In this case, as well as those previously described, the bucket-cover should be made in sections, and the line of division between the sections may correspond to those described in connection with Fig. 2.

In accordance with the provisions of the patent statutes I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof; but I desire to have it understood thatthe apparatus shown is only illustrative and that the invention can be carried out by other means.

What I claim as new, and desire to secure I by Letters Patent of the United States, is-

1. In a turbine, the combination of buckets,

a cover for the buckets, and a binding-band ing-band which is held in place by riveting over the ends of the tenons.

5. In an elastic-fluid turbine,.the combination of a bucket wheel or support, a cover for the buckets, and a binding-band which holds the cover in place and encircles the wheel more than once.

6. In an elastic-fluid turbine, the combination of a wheel or support having a plurality of buckets, a tenon on each bucket, and a binding-band which is wrapped around the wheel more than once and is held in place by the tenons.

7 In an elastic-fluid turbine, comprising buckets having tenons, a cover for the buckets having openings which register with the tenons, in combination with a retaining device for the cover which is held in place by the tenons.

In witness whereof I have hereunto set my hand this 17th day of December, 1903.

HENRY GEISENHONER. Witnesses:

BENJAMIN B. HULL, HELEN ORFORD. 

